KCalc.← All CalculatorsAreas & Layout
Room Area Calculator
Use this room area calculator to estimate floor area from room length and width.
Formula: Length x Width
Example
Formula: Length x Width = 5 m x 4 m = 20 m²
Choose units for length and width, then pick a result unit (m²).
Tip: Choose your result unit on the right before calculating.
Step-by-step calculation
- Enter room length and width with units.
- Select the result unit you want (m²).
- Calculate to see the room area and steps in the selected unit.
FAQ
- What about irregular rooms?
- Split into rectangles and add the areas.
- Why use m²?
- It is standard for flooring and paint estimates.